Rotating endless-screen belt for the mechanical purification of water



Aug. 30

E. GEGER ROTATING ENDLESS SCREEN BELT FOR THE MECHANICAL PURIFICATION OF WATER 2 shuts-Sheet l Filed March 25,' 1926 f g /E. GEIGER ROTATING ENDLESS SCREEN 'BELT FORv THE MECHANICAL PURIFICATION OF WAVTER Filed March 25, 1926 2 Shoots-Shen.A 2

/NVENTH Patented Aug. 30, 1927.

narran s'rATEs PATENT OFFICE.

' EUGEN GEIGER, or xARLsRoHE, GERMANY.

ROTATING NDLESS-SCREEN BELT FOR THE MECHANICAL PVRIFICATION OF WATER.

Application led March 25, 1926, Serial No."97,394, and in Germany April 2, 1925.

chains which are disposed one at each side,

and which are guided in two U-shapedrails mounted on theside walls of the water ehanr nel by means of rollers that are mounted on pins lformed by the ends of the bolts connecting the chain links, the chains being driven above the water by two lwheels mounted upon a common shaft and provided with teeth engaged by the rollers which run over them. y f

The mounting of the guide rollers upon their bearing pins must be both simple and secure. The spaces between the contact faces of the rollers and the bearing pins must be well closed up to prevent dirt penetrating.l Vear must be reduced to a minimum and confined to a few parts that can:

be easily and quickly replaced. These con ditions are satisied by mounting each of the 25 rollers upon a bush, which is screwed at its inner part upon the bearing pin and pre-r vented from working loose. A fixed flange at the outer end ofthe bush and a collar or ring screwed on to the bearing pin between the inner end of the bush and an enlarged part of the bearing pin, prevent the roller from moving outwardly and inwardly and also close up the spaces between the contact faces of the roller and the bush, and the collar or ring referred to also prevents the chain links that are mounted upon the enlarged part of the bearing pin from displacement outwardly.

The screw which in order to prevent the a hole in the end of the bush and screwed into an axial bore in the bearing p in,- is according to my invention formed as a nonreturn valve and provided at its head-with of a grease gun. By this means it is possible very rapidly and safely to lubricate the rollers and the links suiciently. It is vmerebush from working loose is passed through'.

' a boss upon which may be applied the nozzle` lynecessary to place the nozzle of the grease gun upon the boss of the safety screw7 and toV remove itafter the lubricant has been forced in. v Thus it. isznot necessaryv to withdraw the safety screw and then to rinsertthe grease gun' and, after .the forcing inof theA lubricant, to reverse the operations by withdrawingy the grease gun and replacing the safetyl screw. These operations would 'involve such a` waste of time in their being carried out that the screen belt would require to remain stationary until the many rollers were thoroughly lubricated.L

In the accompanying .drawings Fig. l shows the upper partof an endless screen belt in vertical section with one of the two upper chain wheels in side elevation, and Fig. 2 shows in longitudinal section a form of construction of the guiding rollers and the bearing pins. Y

The endless screen belt, Fig. l7 is composed of a number' of screen sections l which are held in vframes 2. These frames are'carriedk by two endless chains 3 which are dis! posed on both sides of the belt. The links ofthese chains are connected together by horizontal bolts 4 both ends of which form a bearing pin a and carry'a roller b. AThe chains 3 are by means of these rollers guided in two U-shaped railsl 5 mounted on the side walls 6 of the water channel andare driven above the water by two wheels 7 mounted upon a common shaft 8 and provided with a number of peripheral gapsor notches 9 engaged bythe rollers brunning over them- .As shown in AFig.2 a'bronze bush c having thick walls is mounted upon the outer part of the bearing pin a of the roller b, and its bore is screw-threaded at the inner end at d, and is closed at the outer end by an inwardly extending flange e. At the outer end the bush is also provided with an outwardly extending flange f. This bush is lirmly screwed upon the screw-threaded inner part of the pin a and is prevented from working loose by a. round headed screw g which passes through an axialv hole formed by the flange e and is screwed into an axial bore It fjl outer link Z, the bush 7c' andthe pin a 'the bore 71, being inl communication with the spaces between these contact faces by transverse passages my, wand 0. The screw g is provided with an axial bore partially Yclosed at the inner endv byf a perforated screw threaded plug p. The said bore contains a helical springv g anda small steel ball k7'z which is pressed by said spring into the re-v stricted outer end of-said bore and thus closes the latter outwardly. Furthermore, the screw g isprovidedat-the.y outer tace. ot'its head with an outwardly inclinedy annular groove storming aplain cylindrical boss t.

In order to lubricate the. guide roller l), the bush le and the chain linksl, it isonly necessary -to Vplace the nozzley o ot the grease gun u upon the bossLt, whereby the sleeve w mounted uponthenozzle tits exactlywith its `protrudingtapered edge upon-the boss t and within the annularA groove s. It now the piston ot kthe' grease gun a is advanced by screwing, the lubricant passingl out through the nozzle i) tightly presses the leather cap x against the end tace 'ot the boss tu The leather cap iswmountecl in a conical recess within the nozzle andis pro vided with a central hole; by these means the space between the end :tace ot the boss t andthat of the nozzle is closed, so that the lubricant cannot escape at the. sides,` but.

presses back, the ball fr andescapes through the bores in the parts g and p, through the bore It, and through the passages m, a and 0 into position between the faces to be lubii cated; lVhen removing the greasegun the bore in the screw gis automatically closedv by the ball fr Linder the pressure ot' theV springg.

In this way all guide rollers and chain links of the' screen belt may be positively and thoroughly lubricated without danger during working and in a short space` ot'. The screw g may be easily withtime. drawn forv the purpose ot cleaning the passages tor the lubricant or tor replacement with'the valve ball andthe spring.

1What I claim as my invention and desire to secure by Letters Patent is:

l. In a rotating endless screen belt for the mechanical purilication of water, being composed of` a number of screenl sections,

in combination with a number ot trames holding said screen sections, two endless chains carrying said frames on both sides, bolts connecting together the links of said chains7 guiding rollers carried by the ends of said bolts, cach ot said ends forming a bearing pin, a bush closed at itsouter end and mounted upon said bearing pin, one of said rollers being loosely mounted upon said bush, means tor preventing said roller from moving outwardly and inwardly, an axial bore in said pin, transverse passages in said pin and said bush connect ing saidaxiatbore with the spaces between the contact faces otl said bush and said roller, a'headed screw passing through Vthe closed end o-jlsaidbush and engaging with the outer end ot said axial bore, an axial bore in-said screw communicating with that in said pin, Yand means contained insaid screw for automaticallyV closing said bore.

therein outwardlyr under spring pressure and'automatically opening inwardly under outer pressure v Q. In al rotating endless screen belt for, the mechanical purification .ot water, being composed'ot a number of screensezctions, in combination with a number ot, trames holding said screen sections, two endless chains carrying said trames on both sides. bolts connecting together the links of said chains, guiding rollerscarried by the ends of said bolts, each of said ends forming abearing pin, abush closed at itsv outer end and mounted upon said bea "ing pin, one ot said rollers being loosely mounted uponsaid bush, means :torpreventingsaid roller from' moving outwardly and inwardly, anaxial bore in said pin, transverse; passages in said pin and Asaid bush connecting said :axial bo; with theV spacesbetween the `Contact tac/cs otsaid bush and said roller, a headed screw passing through the closed end of said bush and engaging with the outer end ot' said axial bore, an axial bore in said screw'commiinicating with that in said pin, means containedinsa-id screw for automatically closing said bore therein `outwardly undery spring pressure and automatically opening inwardly underouterpressure, and a cylindrical boss provided atv the outer tace of the head otsaid screw.

In a rotating endless screen belt for the mechanical purilication ot water, being composed ot a number ol" screen sections, in combination with a number of frames holdin'g said screen sections, two end-less chains carrying said trames onboth sides` bolts connecting together the links ot' said chains, guiding` rollers carried by the ends of said bolts, each of said endslorming a bearing pin, a bush closed at its outer end and mounted upon said bearing pin, one of said rollers being` loosely mounted upon said bush, lmeans torpreventing said-roller tromv llo pin and said bush connecting said axial.

bore with the spaces between .the contact faces of said bush and saidroller, a headed screw passing through the closed end of said bush and engaging with the outer end of said axial bore, an axial bore in saidv screw communicating with that in said pin, and having a restricted outer end, a perforated screw threaded plug partially closing the inner end of the bore in said screw, aball contained in this bore, and a spring also contained therein and pressing said ball into said restricted outer end thereof.

4t. In a rotating endless screen belt for the mechanical purilicaton of water, being composed o' a number of screen sections, in combination with a number of frames holding said screen sections, two endless chains carrying said frames on both sides, bolts connecting together the links of said chains, guiding rollers carried by the ends of said bolts, each of said ends forming a bearing pin having a threaded outer part and an enlarged inner part, a bush closed at its outer end and mounted upon the outer part of said bearing pin, an outwardly extending flange at the outer end of said bush, a ring screwed upon the outer part of said pin between the inner'part of the same and said bush, one of said rollers being loosely mounted upon said bush between said flange and said ring, an axial bore in said pin,V

transverse passages in said pin and said bush connecting said axial bore with the spaces between the contact faces of said bush and said roller, a headed screw passing through the closed outer end of said bush and engaging with the outer end of said axial bore, an axial bore in said screw communicating with that in said pin, and means contained in said screw for automatically closing said bore therein outwardly under spring pressure and automatically opening inwardly under outer pressure.

5. In a rotating endless screen belt for the mechanical purification of Water, being composed of a number of'screen sections, in combination with a number of frames holding said screen sections, two endless chains `carrying said frames on both sides, bolts connecting together the links of said chains, guiding rollers carried by the ends of said bolts, each of said ends forming a bearing pin having a screw-threaded outer part and an enlarged inner part, a bush closed at its outer end and mounted upon the outer part of said bearing pin, an outwardlyvextending flange at the outer end of said bush, a ring screwed upon the outer part of said pin between the inner part of thesame and said bush, one of said rollers being loosely mounted upon said bush between said flange and said ring, an axial bore in said pin, transverse passages in said pin and ysaid bush connecting said axial bore with the spaces between the 'contact faces of. said bush and said roller, a headed screw passing through the closed` outer end of saidA bush and engaging with `the out-cr end of said axial bore, an axial bore. in said screw communicating with that in said pin, and having a restricted outer end, a perforated screw threaded plug partially closing the inner end yof the bore in said screw, a ball contained in this bore, and a spring` lalso contained thereinl and pressing said ball into said restricted outer end thereof.

6. In a rotating endless screen belt for the mechanical purification of water, being composed of a number of screen sections, in combination with a number of frames holding said screen sections, two endless chains carrying said frames on both sides, bolts connecting together the links of said chains, guiding rollers carried by the ends of said bolts, each of said ends forming a bearing pin having a screw-threaded outer` part and an enlarged inner part, a bush mounted upon the outer part of said bearing pin, an inwardly and Y an outwardly extending flange at the outer'end of said bush, a ring screwed upon the outer part of said pin between the inner part of the same and said bush, one of said rollers being loosely` mounted upon said bush between said outwardly extending flange' andsaid ring, an axial bore in said pin, transverse passages in said pin and said bush connecting said axial bore with the spaces between the contact faces of said bush and said roller, a headed screw passing through said inwardly extending flange and screwed into said axial bore, the head of said screw being counter-sunk to lie upon said inwardly extending lange, an axial bore in said screw communicating with that in said pin, and means contained in said screw for automatically closing said bore therein outwardly under rspring pressure and automatically opening inwardly under outer pressure.

7. In a rotating endless screen belt for the mechanical purification of water, being composed of a number of screen sections, in combination with-a number' of frames holding said screen sections, two endless chains carrying said frames on both sides, bolts connecting together the links of saidv chains, guiding rollers carried by the ends of said bolts, each of said ends forming a bearing pin having a screw-threaded outer part and an Aenlarged inner part, a bush mounted upon the outer part of said bearing pin, an inwardly and an outwardly extending flange at the outer end of said bush, a ring screwed upon the outer part of said pin between the inner part of the sameand said bush, one of. said rollers being loosely mounted upon said bush between said outwardly extending flange and said ring, an axial bore in said pin, transverse passages insaid pin and said-bush connecting said axial bore with the spaces between the contact faces of said bush and said roller, a headed screw paseing through saidv inward-l ly extending flange and screwed into said axial bore, the head of said screwA being counter-sunk to lie upon Said inwardly extending` flange, an axial bore insaid Screw communicating with that in said pin. and

l0 having a restricted outer end, a perforated sereW threadedi plug partially Closing` the inner. end ofthe bore in said screw, a ball containedin this bore, a. spring also contained-thereiny and pressing saidxloall into. said. restricted outer end thereof, and a cylindrical boss. provided atthevouter face ofthe head'of saidscrew.

In vtestimony Whereofl atlix my signature.

DR., EUGEN GEGER. 

